JPH06329129A - Device and method for liquid-filling - Google Patents

Abstract

PURPOSE:To provide a filling device and filling method for liquid, which is a method to fill a liquid in a container after removing micro-impurity in the liquid to be filled by a filter, and can continuously fill a liquid in a large number of containers efficiently, and also can maintain the function of the filter always at a highly efficient condition. CONSTITUTION:The filling device for liquid shall have the following: (A)-(C). (A) A liquid feeding line which has a filter on the line. (B) Two or more liquid feeding ports which are provided at the final end of the liquid feeding line and are equipped with a flow rate adjusting function. (C) A flow rate control system which has a function to adjust the flow rate of the liquid to be fed to respective liquid feeding ports, and also has a function to uniformly maintain the flow rate of the liquid passing through the filter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filling device and a liquid filling method. More specifically, the present invention is a method for filling a container with the liquid after removing fine particles in the liquid to be filled with a filter, which can efficiently fill a large number of containers continuously with the liquid. ,
In addition, the present invention relates to a liquid filling device and a liquid filling method capable of constantly maintaining the function of a filter in a highly efficient state.

[0002]

2. Description of the Related Art It is known to fill a container with a liquid after removing fine particles in the liquid to be filled with a filter. However, when a large number of containers are sequentially filled with liquid, it is necessary to change and adjust the flow rate of the liquid supplied to the containers with the replacement operation of the containers. There is a problem that the concentration of the fine particles in the inside fluctuates and increases.

[0003]

Under these circumstances, the problem to be solved by the present invention is a method of removing fine particles in a liquid to be filled by a filter and then filling the liquid into a container. It is an object of the present invention to provide a liquid filling device and a liquid filling method capable of continuously filling a large number of containers with liquid efficiently and maintaining the function of a filter in a highly efficient state at all times.

[0004]

[Means for Solving the Problems] The present inventors first examined the cause of the increase and fluctuation of the concentration of fine particles. As a result, the filter for removing the fine particles in the liquid maintains a high trapping effect due to the so-called bridging phenomenon in which the fine particles trapped in the filter bridge the eyes of the filter, and the filter is filled. The flow rate of the liquid that passes through the filter fluctuates when switching between an empty container and a filled container, at which time the filter bridge is destroyed, and the microparticles that formed the bridge are scattered again into the liquid, and the bridge It was found that the removal efficiency of the filter that was destroyed was decreased. Furthermore, the present inventors have found that the above-described problems can be solved at once by the present invention described below, and have arrived at the present invention.

That is, one of the present inventions relates to a liquid filling device having the following (A) to (C). (A) Liquid supply line having a filter in the middle (B) Two or more liquid supply ports installed at the end of the liquid supply line and having a flow rate adjusting function (C) The flow rate of the liquid supplied to each liquid supply port A flow rate control system having a function of adjusting and a function of maintaining a constant flow rate of the liquid passing through the filter.

Another aspect of the present invention is to use the above-mentioned apparatus to fill a container conveyed to one or more liquid supply ports with a predetermined amount of liquid, and then to perform the other one or two. A method for filling a liquid, which fills a container conveyed to the above liquid supply port with a predetermined amount of liquid, and keeps the flow rate of the liquid passing through the filter always constant when the filling is sequentially repeated. is there.

The details will be described below. The filling device of the present invention has (A) a liquid supply line having a filter in the middle thereof. When the liquid passes through this filter, fine particles in the liquid are captured and removed. Examples of the filter include a Teflon filter, a polyethylene filter, and a polypropylene filter, which have chemical resistance.

The filling device of the present invention is (B) installed at the end of the liquid supply line and has two or more liquid supply ports having a flow rate adjusting function. That is, the liquid supply line of (A) is branched into two or more branch pipes at its end, and each branch has a flow rate adjusting function including a fully closing operation. As a method for providing the flow rate adjusting function, a usual method may be used, and examples thereof include a method using a diaphragm type flow rate adjusting valve or a cylinder type flow rate adjusting valve. The wetted portion of the control valve is preferably made of stainless steel or Teflon. It should be noted that it is preferable to install an automatic transporting device at each liquid supply port, which carries an empty container into the lower part of the supply port and carries out a filled container from the lower part of the supply port.

The filling device of the present invention has a function of (C) a function of adjusting the flow rate of the liquid supplied to each liquid supply port, and a function of maintaining the flow rate of the liquid passing through the filter constant. It has a system. here,
As the flow rate control system, for example, a system having a function of adjusting the opening degree of the flow rate adjusting valve of the above (B) by the amount of liquid passing through the valve, the opening degree of the flow rate adjusting valve of the (B) is filled in a filling container. It is possible to cite a system for adjusting according to the amount of liquid.

In the present invention, it is necessary to keep the flow rate of the liquid passing through the filter of (A) constant while adjusting the opening degree of the flow control valve of (B). That is,
In a plurality of flow rate control valves, when the opening degree of a certain flow rate control valve is increasing, the opening degree of another one or more flow rate control valves is decreased, so that the flow rate of the liquid passing through the filter of (A) is reduced. Keep it constant. For this purpose, (B) a detection system for detecting the opening degree of each flow rate control valve and a control system for performing a calculation using the detection signal and keeping the flow rate of the liquid passing through the filter (A) constant are used. Goodbye. As a system that meets such a purpose, a system designed and manufactured by a usual method may be used, or a commercially available system may be applied.

As is apparent from the above, the filling apparatus of the present invention fills a container conveyed to one or more liquid supply ports with a predetermined amount of liquid, and then fills one or more other liquid supply ports. When a predetermined amount of liquid is filled in the container transported to the container and the filling is sequentially repeated, it is used in a liquid filling method in which the flow rate of the liquid passing through the filter is always kept constant.

Further, according to the present invention, a large number of containers can be continuously filled with liquid efficiently, and the function of the filter can always be maintained in a highly efficient state.

[0013]

【Example】

Example 1 Filter on the way (made of Teflon, opening 0.05 μm)
A liquid supply line having a liquid supply line, two liquid supply ports installed at the end of the supply line and having a flow rate control function (diaphragm type flow rate control valve), and adjusting the flow rate of the liquid supplied to each liquid supply port A flow rate control system that has the function of maintaining the flow rate of the liquid that passes through the filter (detects the opening of each flow rate control valve, calculates using this opening, and passes through the filter) A device having a flow control system for keeping the liquid flow rate constant was prepared. A particle meter capable of measuring the particle concentration in the liquid was installed at each liquid supply port. A liquid containing fine particles is supplied to the above apparatus, and the particle concentration in the liquid (particle size 0.
Change of 1 μm or more) was observed. The flow rate control system described above controlled the flow rate of the liquid passing through the filter section to be constant. The results are shown in Fig. 1. The results show that the particle concentration in the liquid at the supply port is always maintained at a low level.

Comparative Example 1 The procedure of Example 1 was repeated, except that the flow rate control system of Example 1 was not used and the flow rate of the liquid passing through the filter section was varied. The results are shown in Fig. 2. From the results, it can be seen that the particle concentration in the liquid at the supply port has reached an extremely high level according to the fluctuation of the liquid flow rate passing through the filter section.

[0015]

Industrial Applicability As described above, according to the present invention, a method of filling a liquid into a container after removing minute impurities in the liquid to be filled by a filter, is effective for continuously supplying the liquid to a large number of containers. It was possible to provide a liquid filling device and a liquid filling method capable of filling well and maintaining the function of the filter in a highly efficient state at all times.

[Brief description of drawings]

FIG. 1 is a chart showing the results of Example 1.

FIG. 2 is a chart showing the results of Comparative Example 1.

Claims (2)

[Claims] 1. A liquid filling device having the following (A) to (C): (A) Liquid supply line having a filter in the middle (B) Two or more liquid supply ports installed at the end of the liquid supply line and having a flow rate adjusting function (C) The flow rate of the liquid supplied to each liquid supply port A flow rate control system having a function of adjusting and a function of maintaining a constant flow rate of the liquid passing through the filter. 2. Using the apparatus according to claim 1, the container transported to one or more liquid supply ports is filled with a predetermined amount of liquid, and then transported to another one or more liquid supply ports. A method of filling a liquid, in which a predetermined amount of the liquid is filled in the prepared container and the filling is sequentially and repeatedly performed so that the flow rate of the liquid passing through the filter is always kept constant.